The imported photoelectric encoder is used for displacement measurement. The controller adopts embedded single-chip microcomputer structure and built-in powerful measurement and control software, which integrates measurement, control, calculation and storage functions. It has the functions of automatically calculating stress, elongation (extension meter required), tensile strength and elastic modulus, automatic statistical results; automatic recording of maximum point, breaking point, force value or elongation of specified point; experiment with computer The dynamic display of the process and test curve, and data processing, after the end of the test, the data can be re-analyzed and edited by the graphic processing module, and the report can be printed, and the product performance reaches the international advanced level.